My swing shifts were 1500 to 2300, back in the day.
That was the drinking shift. Bars were open till 2:00.
I was a bad boy on that shift.
Midnights, from 2300 to 0700, were for nightwalkers, a whole different species, and where I spent most of my life.
Day monkeys worked 0700 to 1500. That was for the asskissers, desk jockeys, and political animals. I did poorly on that shift, the short time I spent there.
Just sayin'.
0600-1800 = Days
1800-0600 = Nights